Por qué en la clonacion tiene que realizarse con una célula?

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?

All ova contain sex chromosomes corresponding to: x y xx xy

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic